Heat-radiator demonstrator



A rai 1, 1924. 1,488,699

H. W. NEAL HEAT RADIATOR DEMONSTRATOR Filed Dec. 5, 1923 '7 IHvEHToR, a HARRY W. HEAL,

7 Attorney;

' 50 supporting legs removed; and" ig. 5, anjend thenischa g conduits Patented Apr. 1 1924. 1 i

" UNITED STATES,

PATENT'OFVFIICE-" HARRY W. NEAL, F INDIANAPOLIS, INDIANA, ASSIGNOR TO HALL-NEAL FURNACE COMPANY, OF INDIANAPOLIS, INDIANA .A. CORPORATION OF INDIANA.

I HEAT-RADIATOR Application filed December 5, ieeal- Serial 11 678,763.

To all 'wkomit may concern:

Be it known that I, HARRY W. NEAL, -a citizen of the United. .States, residing at Indianapolis, in the county of Marion and 5 the State of Indiana, have invented a new and useful Heat-Radiator Demonstrator, of which the following is a s ecification.

.My invention relates to improvements in means for demonstratin the difl'erence in heat radiation from various radiating surfaces, andit is the object of my invention to provide such means in a small compact form that is easily portable for the primary purpose of making convincing demonstrations of the difi'erenoe in heat radiation in various types of hot air furnaces. It is In further object to provide such means in a orm that admits of ready inspection of its internal construction and in which a convenient ac source of heat is supplied, with means for determinin the difl'erence in radiation of 7 heat from t e varying radiating surfaces There are many variant types of heating furnaces ofiered to the public, but the pub-- 7' at he has had no actual means of determining the relative merits of such furnaces as heating devices other than from installations in varying types of buildings, under which conditions many variations enter so as-to to. make actual comparisons of the heating ability a matter of conjecture. With my invention, the varying types of furnaces may be assembled in minature' to operate under identical conditions and the merits of each as type convincingly shown by actual direct comparison. I

I accomplish these and other objects as may hereinafter appear by the means as shown in the accompanying drawing, in

which- Fig. 1 is an elevation of my'heat radiator demonstrator, with a fragment of the outer housing and a section of. the innercombustion chamber wall removed toi-ndicate the inner construction more clearly; Fi 2, a top plan vView. of the heat radiator e'monstrator; Fig. 3, a section taken on the line 33 in Fig. 1; Fig. 4,-a top plan view of the heating element with fra cuts of the view of the thermometer support as used in Likecharacters of reference indicate like.

parts throughout the several views.

I mount an electrically operated heating element 5, of common and well known construction, on the center of a base formed by joining the four legs 6, 7, 8, and 9 at the the four bolts 10, 11, 12, and,13'and be posi- 1 tioned thereby centrally oil ,the base le 6, 7, 8, and 9. To the outside of the com use tion chamber 15, on diametrically opposed elements of the cylindrical wall and the corresponding diameter of the top, I secure a dividing partition 16, which extends outwardly and is secured to the walls of the housing 17 so as to locate the housing 17 to contain the chamber 15 centrally within the housing. The housin 17 is entirely open at the lower end an rests upon the base legs 6, 7, 8, and 9. The upper end'of thehousing is ermanently enclosed by the top 18 having t e shape of a frustrum of a cone. 'The partition 16 extends upwardly into thetop 18 and makes a ti ht fit against the sides and top, such that t e interior of the entire enclosure bounded by the outer housing 17, the top 18, and the combustion chamber 15 is effectually divided into the radiating chamber 19, and a second radiatin chamber 20 of equal volume. I he top 18 is surmounted by a window 21 of some suitable transparent and heat proof. material as mica or the like, to afford a view into either of the two chambers. Mounted 'on the conical side of the top 18, are the windows of like. material, 22, and 23, giving view into the chamber 19, and the similar windows 2% and 25 giving view into the chamber 20. w

Discharging from the conical wall of the top 18 fromthe chamber 19, is the hot air conduit 27 extending outwardly and slightly upwardly to an ap reciable lateral dislike manner firom the chamber 20; Near the "outer ends of-the-conduits are secured the clamps 29, Figs. 1, 2, and 5, 'for the purpose of holding thermometers 36, and the open- 'tance. -A-similar con uit 28 discharges in.

and thence upwardly to a point substantially above'the'top 18. 7

Within the chamber 19, the radiating fins 35 extend radially at close intervals entirely around the half circumference of the combustion chamber 15 lying within the chamber 19 and form a plurality of-flues open at the bottom and top. This construction embodied in chamber 19 represents in miniature one form of a heating furnace, while the construction embodied in the chamber 20 representsa common and well known type of hot air furnace construction having the usual heating drum in addition to the combustion chamber.

In making a demonstration, I allow an electric current to flow through the heating element 5 to produce a comparatively intense heat. The heated air within the combustion chamber 15 will rise and escape through the pipe 32 into the drum 33, down-' through the drum and out and up through the smoke pipe 34 into the open. Such action represents the usual action employed in .hotair furnaces in effecting a large-radiating surface heated by the flow of hot gases from the combustion chamber. The air in the chamberv 20 between the outer housing 17 and the combustion chamber 15 .will become heated and rise, such action drawing air from without up through the open bottom across the heated surfaces within the chamber 20 and creating a flow of warm air discharging through the conduit 28, which action would correspond to the flow of hot air to the registers within a building in the usual furnace installation.

At the same. time the foregoing flow of warm air is taking place from the chamber 20, the heat from the combustion chamber 15 is distributed by the fins 35 in the chamber 19 and air enters the chamber from the opening below, passes up through the fiues formed between the fins 35, becomes heated,

,and discharges through the conduit 27.

The readings of the thermometers 36 in theconduits 27 .and 28 will indicate the com- Qparative radiating efficiencies of the two constructions as described. In practice, I

find that the .air discharging from the chamber 19 from the fin construction to be several degrees higher in tem rature than that of the air discharged om chamber 20. Inasmuch as the source of heat is common to both chambers of equal volume and of symmetrical shape, the difference in temperature can be due only to the ability of the one construction to radiate more heat than the other.

v,When the demonstration 'is completed, the conduits 27 and 28, and the smoke pipe 34 may be removed from the housing, and the housing'and its associated parts removed from the base legs andthe heating element all for the purpose of allowing the demonstrator to be reduced to a form that maybe placed in some form of sample case to be readily carried from place to place. Having fully described my invention in the form now best known to me, I desire to point out that theprecise structure as set forth may be varied without-departing from the spirit-of the invention and I therefore do not desire to be limited to the form as shown any more than may be required by the following claims.

I claim:

1 In a-heat radiating demonstrating deyice, a plurality of radiating chambers havmg a common source of heat, conduits discharging from said chambers, and means of indicating temperatures of air discharged by saidconduits.

2. In a heat radiating demonstratin device, a plurality of radiating'chambers aving variant radiating surfaces within the chambers; means of reducing a supply of heat common to all 0 said chambers; a conduit discharging from each of said chambers; and means within each of'said' conduits of determining the temperature of the air passing through the conduits.

3. In a heat radiating demonstrating deyice, a plurality of radiating chambers within a common housing, each chamber having within it a variant radiating surface; means of producing a supply of heat common to each of said chambers and said means located centrally of the chambers; a conduit dischar 'ng upwardly and outwardly from each 0 said chambers; and means within each of said conduits. of determining the temperature of the discharging air.

4. In a heat radiating demonstrating device, an outer housing; an inner central combustion chamber; partitions within the chambers; a plurality of heat radiating surfaces within the radiating chambers; con- 'housing defining a plurality of radiating vice, a supporting base; an outer housing; a

lurality of inspection windows in the outer ousing; an inner central combustion cham-' ber; a plurality of heat radiating chambers having equal volume and formed within the ammo said housing and without the combustion chamber; a plurality of heat radiating surfaces within each of said radiating chambers; a conduit discharging from each of said radiating chambers; means within each of said conduits of determining the temperature; and means of discharge from the combustion chamber thro h one of the radiating chambers to a smo e pipe without the housing.

6. In a heat radiating demonstrating device, a supporting base; a heating element secured thereto; a combustion chamber;

. means of positioning the combustion chamber centrally of the heatin element; an outer housing resting on sai base; a plurality of ins ction windows in said housing; a plurality of heat radiating chambers having ual volume formed within the said housing y partitions extending between the combustion chamber and the outer housing; a plurality of heat radiating surfaces within each of said heat radiating chambers; a detachable conduit dischar g from each of said heat radiating cham rs; means of determining the temperature within each of said conduits; and means of discharge from the combustion chamber through one of said radiatin vchambers to a detachable smoke to pipe wit out the said housing.

7. In a heat radiating demonstrating de vice, in combination, a supporting.v basea heating element secured thereto; a cylin ical combustion chamber; means of detachably positioning the combustion chamber centrally of the heating element; an outer lindrical housing resting on said base; a

0 p uralitly of windows in said housing; a diametrica partition within said housing dividing two heat radiating chambers of equal volume within said housing and without said combustion chambers; a pluralit of radiating surfaces in one of said eat radiating chambers consisting of a plurality of radial fins in contact wlth the combustion chamber; a radiating drum in the other of said radiating chambers; means of discharge from the combustion chamber into the drum; a detachable smoke pipe without the said housing means of dischar from said drum into sai smoke pipe; a etachable conduit discharging from each of the said radiating chambers; and means of determinin temperature within each of the said duits.

Signed this the 30th day of November, 1923, at Indianapolis, county of Marion, and State of Indiana.

con-

HARRY w. NEAL.

the 

